Add --nothreading option to Django runserver command and implement HTMX debug modal for JSON responses

docker/docker-compose.dev.yml

@@ -8,7 +8,7 @@ services:
     # Development: run Django's autoreloading development server instead of
     # the production entrypoint/gunicorn. Mount the repository into the
     # container so code edits on the host trigger Django's autoreload.
-    entrypoint: ["python", "manage.py", "runserver", "0.0.0.0:8000"]
+    entrypoint: ["python", "manage.py", "runserver", "0.0.0.0:8000", "--nothreading"]
     # Clear any command set by the prod compose file (which would be passed
     # as an extra argument to manage.py). Setting an empty command prevents
     # the image `command` from being appended to the entrypoint.

docker/docker-compose.local.yml

@@ -13,7 +13,7 @@ services:
       # lives at rad/Dockerfile inside the context.
       context: ..
       dockerfile: rad/Dockerfile
-    command: python manage.py runserver 0.0.0.0:8000
+    command: python manage.py runserver 0.0.0.0:8000 --nothreading
     #command: pip install -r requirements.txt
     volumes:
       # Mount the repository root into the container WORKDIR so manage.py and